Wireless Bluetooth speakers work with nearly all smartphones (Android, Windows Phone, BlackBerry) and many Android tablets, as well as all iPhones, iPads, and all iPod Touch models (except for the first-gen Touch).
Audio fidelity is often a step down from the non-Bluetooth options like AirPlay speakers -- but a lot of people can't hear the difference, and the quality of Bluetooth speakers has improved in recent years. Note that many Bluetooth speakers are designed with rechargeable batteries, so they can be moved from room to room with ease. Some include speakerphone functionality as well. You'll find our current top Bluetooth picks below.
If you're looking for something else, you can also check out our list of the best speakers overall.

The TDK Life on Record Trek Max A34 Wireless Weatherproof Speaker delivers very good sound for its size and affordable price, and it's well suited to both indoor and outdoor use with a sturdy, splashproof design.

The Jawbone Big Jambox doesn't quite measure up to the Bose SoundLink Wireless Mobile and it carries a premium price tag, but it's an impressively designed product that offers strong performance and speakerphone capabilities.